Petrophysical parameters such as porosity, water and oil saturations, formation resistivity factor, etc. describe the storage capability of the porous media or the capacity of rocks to hold fluids. The modified Archie’s equation . / . , also called the saturation equation, is used to determine the water saturation. Archie’s parameters, namely , , and , are sometimes assumed constant to simp...

Spontaneous imbibition is of special importance to oil recovery from fractured reservoirs. Laboratory measurements of volume of liquid imbibed versus time are often used in the prediction of oil recovery. Imbibition measurements also provide a useful approach to the complex problem of characterizing the wetting properties of porous media. Correlation of a large body of data for imbibition of br...

Tight reservoirs hold a vast natural gas in Ordos Basin, and efficient development of these resources can offset the energy shortage. Due to low-porosity low-permeability, hydraulic fracturing becomes necessary tap its resources. After fracturing, large amount fluid fills pore space near fracture, which will influence production. This study focused on water occurrence tight influencing factors....

In this paper, we extend the second and third order classical central schemes for the hyperbolic conservation laws to solve the modified Buckley-Leverett (MBL) equation which is of pseudo-parabolic type. The MBL equation describes two-phase flow in porous media, and it differs from the classical Buckley-Leverett (BL) equation by including a balanced diffusive-dispersive combination. The classic...

Low temperature calorimetry (LTC) is usually applied to characterize the porosity of cement-based materials with a total water saturated state. By recording the heat flow of the sample at different testing temperatures, the ice content in the freezing and the melting process can be analyzed. In order to investigate the state of the water during the freezing/melting process of unsaturated porous...

The saturation calculation in complex reservoirs remains a major challenge to the oil and gas industry. In simple formations, tendency towards models such as Archie or Simandoux for clean shaly respectively is always preferable. These were found be working effectively homogeneous formations within which porosity permeability are linked light of facies scheme. Where rocks show some degrees heter...

Abstract Log interpretation and evaluation of tight sandstone reservoir in Chang 8 Member Longdong West area, Ordos Basin, China, are facing great challenges due to the co-development normal oil pay resistivity low-contrast pay. To better guide exploration development resources this characteristics control mechanism were studied. Firstly, reservoirs divided into (RLP) (NP) based on relative val...

The oilfield water in the Upper Sandstone Member of the Zubair reservoir (Barriemian-Hauterivian) at Rumaila North Oil Field was investigated for the interpretation of salinity and geochemical evolution of brine compositions. The interaction of the oilfield water with reservoir rock resulted in a brine water derived from the marine water origin of partial mixing with meteoric water similar to t...

Abstract In this study, we experimentally investigated the effects of chemically enhanced oil recovery methods containing hydrolyzed polyacrylamide (HPAM), surfactant–hydrolyzed (SHPAM), surfactant nanofluids (SNF), that is, coupled with carbon dioxide (CO 2 ) and water chase injection to measure in a sandstone reservoir. To proceed experiments, performed four flooding tests at simulated reserv...

Ž . Ž . Ž . Ž . Feed intake FI , feed efficiency FE , protein efficiency ratio PER and weight gain WG of Ž . juvenile channel catfish initially weighing 15.0"0.23 g 10–12 cm initial total length were Ž evaluated under three regimes of time-varying water temperature mean daily water temperature . Ž for Stoneville, MS, USA; mean q3; and, mean y38C and three of dissolved oxygen DO; 100, . 70 and 3...